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first of all why did you charge the system it never needs to be recharged unless you have a leak in it that being said when you turn on the ac do you hear the compressor clutch kick in and if so do you see condensation on the accumulator and does it feel cold? yes/no if yes then the vacuum door inside the car is not opening thus giving you warm air========if no the refrigerant leaked out again because of a leak ///// or the cycling switch is bad///// or there is still not enough refrigerant in the system to get the switch to turn on the compressor//// or your compressor is n/g
When you turn you heat or air on, your compressor engages. There could be a drag on your belt system. Listen to your air conditioning pump for strange sounds and drag on main drive belt...could be bad bearings or a plugged air conditioning pump (low on cooling Freon in system maybe; lubrication?)
You say that i holds a charge, and the compressore turns, but does the comprressor cycle on and off, as this is indicating that there is enough charge, and once there is low pressure detected, it turns the compressor on, and when it reaches a high pressure, the compressor cycles off.
Lastly, when engine running and AC on, if you feel the 2 pipes going in to the firewall, one should be hot, the other should be cold ???...is this happening ???
To reset your AC compressor, you need to remove power for at least 15 minutes. After you reconnect, the compressor should turn on. If it does, immediately turn to high and try to add refrigerant. Best of luck.
One of 2 problems,either the system is low on freon or most likely the problem is a bad evap temp sensor. This vehicle does not use a cycling switch to cycle compressor on and off like a conventional system does but instead measures the temp at the evaporator core itself.